Enter OK! & Zaarly's Celebrity Halloween Costume Contest!

Exciting news for all you Halloween-heads out there! Ashton Kutcher’s Zaarly — an app that enables people to buy and sell easily within their neighborhood — and OK! are hosting a Halloween photo contest!

How does it all work? Simple! Dress like your favorite celebrity and get the chance to be featured on OKmagazine.com!

Whether it's as Nicki Minaj, Kate Middleton, Katy Perry or Charlie Sheen — we want to see your creativity when it comes to going Hollywood for Halloween.

How does it all work? OK! readers have until Nov. 1 to submit Halloween celebrity doppelgängers to Zaarly.

Visit zrly.it/okhalloween and enter the requested details. Then, simply paste a link to your photo, which can be hosted on Facebook, TwitPic, or wherever you choose to host your photos online.

OK! editors will then select the top 10 photos and place them on OKmagazine.com, where readers will vote for their favorite. The top nine selected will win $100 each. The grand prize winner will take home $1,000 and will be featured in OK!.